panic: pool_p_free: sockpl free list modified: page 0xfffffd8069783000; item addr 0xfffffd806978373a; offset 0x0=0xe3b54c6713bf31dc Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *365135 97809 0 0x14000 0x200 0 systqmp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ff34a) at panic+0x165 sys/kern/subr_prf.c:198 pool_p_free(ffffffff82ced110,fffffd8069783f90) at pool_p_free+0x1d3 pool_gc_pages(0) at pool_gc_pages+0x215 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff82c26c70) at taskq_thread+0x9b sys/kern/kern_task.c:450 end trace frame: 0x0, count: 10 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: pool_p_free: sockpl free list modified: page 0xfffffd8069783000; item addr 0xfffffd806978373a; offset 0x0=0xe3b54c6713bf31dc ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ff34a) at panic+0x165 sys/kern/subr_prf.c:198 pool_p_free(ffffffff82ced110,fffffd8069783f90) at pool_p_free+0x1d3 pool_gc_pages(0) at pool_gc_pages+0x215 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff82c26c70) at taskq_thread+0x9b sys/kern/kern_task.c:450 end trace frame: 0x0, count: -5 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff8000216000d0 rbx 0x4c6713bf31dc3a85 rdx 0 rcx 0 rax 0xffff8000ffffe000 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1cadefacca0cd3af r11 0x6f3d58aeef69bc83 r12 0 r13 0xe3b54c6713bf31dc r14 0 r15 0x1 rip 0xffffffff8250010c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000216000c0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (systqmp) pid=365135 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe828,0xffff8000ffffe2c8 process=0xffff8000ffffc000 user=0xffff8000215fb000, vmspace=0xffffffff82cee588 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 78101 15974 9569 0 3 0x3000 suspend syz-executor.6 78101 523637 9569 0 3 0x4081001 kernel: protection fault trap, code=0 Faulted in DDB; continuing... ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10171 6409K 6896K 78643K 14485 0 pcb 13 14K 16K 78643K 397 0 rtable 239 7K 7K 78643K 590 0 pf 29 8K 9K 78643K 78 0 ifaddr 43 11K 11K 78643K 78 0 ifgroup 50 2K 2K 78643K 131 0 sysctl 2 0K 0K 78643K 4 0 counters 28 17K 17K 78643K 47 0 ioctlops 0 0K 2K 78643K 72 0 iov 0 0K 26K 78643K 386 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1409 88K 88K 78643K 2609 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 45 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 374 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 11 37K 73K 78643K 2083 0 sigio 0 0K 0K 78643K 47 0 proc 58 59K 75K 78643K 645 0 subproc 104 6K 6K 78643K 156 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 239 0 in_multi 99 7K 7K 78643K 157 0 ether_multi 1 0K 0K 78643K 1 0 mrt 2 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 744 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 298 85K 90K 78643K 21249 0 UVM aobj 85 3K 3K 78643K 93 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 84 0 NDP 11 0K 2K 78643K 54 0 temp 83 5913K 5994K 78643K 18378 0 kqueue 12 18K 26K 78643K 164 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 151 0 148 3 2 1 3 0 8 0 rtentry 112 166 0 55 4 0 4 4 0 8 0 unpcb 144 1150 0 1137 17 16 1 6 0 8 0 syncache 304 7 0 7 2 2 0 1 0 8 0 tcpqe 32 108 0 108 2 2 0 1 0 8 0 tcpcb 808 548 0 544 25 24 1 11 0 8 0 arp 88 27 0 9 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 336 1493 0 1486 40 39 1 12 0 8 0 nd6 104 39 0 14 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1160 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 643 0 186 30 1 29 30 0 8 0 art_table 32 644 0 186 4 0 4 4 0 8 0 art_node 16 158 0 57 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 6 1 0 1 1 0 8 0 semapl 112 372 0 362 1 0 1 1 0 8 0 shmpl 112 90 0 8 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3981 0 2526 92 0 92 92 0 8 0 ffsino 240 3981 0 2526 86 0 86 86 0 8 0 nchpl 144 7625 0 5981 63 0 63 63 0 8 0 uvmvnodes 80 5179 0 0 106 0 106 106 0 8 0 vnodes 216 5179 0 0 288 0 288 288 0 8 0 namei 1024 25740 0 25740 5 5 0 3 0 8 0 kstatmem 264 60 0 38 2 0 2 2 0 8 0 scxspl 216 21976 0 21976 19 18 1 8 1 8 1 plimitpl 152 394 0 379 1 0 1 1 0 8 0 sigapl 424 2492 0 2430 9 2 7 8 0 8 0 futexpl 64 20221 0 20221 3 3 0 1 0 8 0 knotepl 120 20932 0 20852 6 2 4 6 0 8 0 kqueuepl 184 745 0 737 4 3 1 4 0 8 0 pipepl 288 389 0 361 8 5 3 5 0 8 0 fdescpl 432 2355 0 2333 5 2 3 4 0 8 0 filepl 120 15067 0 14834 35 27 8 14 0 8 0 lockfpl 104 874 0 872 4 3 1 2 0 8 0 lockfspl 48 404 0 402 1 0 1 1 0 8 0 sessionpl 144 27 0 11 1 0 1 1 0 8 0 pgrppl 48 27 0 11 1 0 1 1 0 8 0 ucredpl 104 1483 0 1470 1 0 1 1 0 8 0 zombiepl 144 2434 0 2430 2 1 1 1 0 8 0 processpl 1008 2492 0 2430 11 3 8 9 0 8 0 procpl 696 5514 0 5438 11 3 8 9 0 8 0 sosppl 168 15 0 15 2 2 0 1 0 8 0 sockpl 456 2803 0 2780 90 87 3 24 0 8 0 mcl64k 65536 70 0 70 8 8 0 1 0 8 0 mcl16k 16384 32 0 32 6 6 0 1 0 8 0 mcl12k 12288 113 0 113 6 6 0 1 0 8 0 mcl9k 9216 18 0 18 6 6 0 1 0 8 0 mcl8k 8192 132 0 132 9 9 0 1 0 8 0 mcl4k 4096 191 0 191 8 8 0 1 0 8 0 mcl2k2 2112 17 0 17 5 5 0 1 0 8 0 mcl2k 2048 68950 0 68898 38 30 8 33 0 8 0 mtagpl 96 148 0 97 4 1 3 3 0 8 0 mbufpl 256 128493 0 128301 158 135 23 65 0 8 1 bufpl 288 7955 0 1557 458 0 458 458 0 8 0 anonpl 24 411771 0 398962 150 55 95 114 0 188 9 amapchunkpl 152 69263 0 68548 47 8 39 41 0 158 2 amappl16 200 10165 0 9776 49 28 21 35 0 8 0 amappl15 192 13 0 13 1 1 0 1 0 8 0 amappl14 184 163 0 152 2 1 1 2 0 8 0 amappl13 176 12 0 12 1 1 0 1 0 8 0 amappl12 168 3036 0 3013 2 0 2 2 0 8 0 amappl11 160 59 0 49 1 0 1 1 0 8 0 amappl10 152 27 0 18 1 0 1 1 0 8 0 amappl9 144 266 0 264 1 0 1 1 0 8 0 amappl8 136 228 0 165 3 0 3 3 0 8 0 amappl7 128 68 0 56 1 0 1 1 0 8 0 amappl6 120 298 0 276 2 1 1 2 0 8 0 amappl5 112 207 0 199 1 0 1 1 0 8 0 amappl4 104 572 0 538 2 1 1 2 0 8 0 amappl3 96 13715 0 13660 5 3 2 3 0 8 0 amappl2 88 2643 0 2584 3 1 2 3 0 8 0 amappl1 80 16864 0 16379 21 10 11 21 0 8 0 amappl 88 20657 0 20473 7 1 6 6 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 92 0 8 2 0 2 2 0 8 0 uaddrrnd 24 2355 0 2333 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2355 0 2333 1 0 1 1 0 8 0 vmmpekpl 168 22004 0 21952 3 0 3 3 0 8 0 vmmpepl 168 159136 0 157228 188 85 103 131 0 357 3 vmsppl 368 2354 0 2333 3 0 3 3 0 8 0 rwobjpl 24 50595 0 43991 42 1 41 41 0 8 0 pdppl 4096 4716 0 4666 210 151 59 68 0 8 9 pvpl 32 924781 0 906922 458 271 187 360 0 265 29 pmappl 216 2354 0 2333 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1191 0 423 24 0 24 24 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ff34a) at panic+0x165 sys/kern/subr_prf.c:198 pool_p_free(ffffffff82ced110,fffffd8069783f90) at pool_p_free+0x1d3 pool_gc_pages(0) at pool_gc_pages+0x215 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff82c26c70) at taskq_thread+0x9b sys/kern/kern_task.c:450 end trace frame: 0x0, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ff34a) at panic+0x165 sys/kern/subr_prf.c:198 pool_p_free(ffffffff82ced110,fffffd8069783f90) at pool_p_free+0x1d3 pool_gc_pages(0) at pool_gc_pages+0x215 sys/kern/subr_pool.c:1583 taskq_thread(ffffffff82c26c70) at taskq_thread+0x9b sys/kern/kern_task.c:450 end trace frame: 0x0, count: -5